Ankle-joint for artificial limbs.



APPLICATIONy FILED OO'lfS, 19

Pateud 5am. 5, 1915.

JAN

ennemies" Ai` ANEllLE-JNT F033 ROWLEY, CI

(naar:

a :for :'Lrtifieial Limbs, of n'liirh ehe following is a specilication.The main object of this i Dro'irle an ankle joint hearin h ma roll ingContact "ith its elements ihn pli 'pose of beingl 'practically Silen'ein opereliiin eren i? nelI lubricated, and which is ndjiis'ahle 'tomaintain any deeired prensiire liefgween the Cooperating' pars of thebearinlj'.

ein illustrative embodiment oi" this invenlLion is shown in theaccompanying' draning-fs, in which- Figure l is a plan "View of an anklejointI constructed according' to this invention. Fig. 2 ifi a sectionalView or". the ankle 'join ii-alren on -the line of Fig. 3. Fig. 3 is asecional rien' of the ankle jifo taken on lhe line' l-B of 2. Fig'. l isa Vertical section showing the join' as applied 'lo an artificial limb.

The par?J of the ankle joinl which is secured to the shin section of anartificial. limb'is shown in the form of a shank threaded al; its end 2and having its einer end formed to provide a pair of arms 3 terminatingin hollow cylinders #l in eo axial alinement.

The cylinders 4 are internally ihreaderl for receivingT threaded conicalbearing' memhers 5 and G. Each of i'zhe bearing' members 5 and 5 isprovided with a slot 'l'. so that by insertingr a screw driver into theopen endsoif cylinders 4 said members may be adjusted coward or awayfrom each other.

y.The bearing member 5 is proriderl with a threaded aperture 8 forreceiving a threade. stud 9 integral with thehearingmember 6.

A shank '10 having a threaded end 11, whereby it may be secured to theioot part of an artificial. limb, is provided with a hollow head '12surrounding the inner ends of theeonicalbearingrnernbers andi, Theinterior surface 13 of head 12 is suitably formed io provide a race forrollers in the form of balls 14 locaed between the surface 13 and theconical surfaces 15 of ehe members 5 and 6. The hollow cylinders l. ofthe arms 3 are preferably provided with annular flanges 16 lo aoiliiatesecuring the body pari of a foot 'lio f required lii'niallion oli' menbetween the shin z. limb may be provided f iure proper.

The outer oorriins journals for ilie fooi C* henri y is ille Conner: twoSections proridi inended to reduce fria-.lion less even after lieliihrir nf The operacion of he lo be appareni. ineenv the elen and fooiJparis of an a# ellleeied o f adjnsing ehe and 6 toward principally nrolli various parts el? the not essenr'ial hai ille par lubricated.

ltlione'h but one Tavern/C emlool' this invention has been l' Lein iedescribed. i'r will he und( alla; some of ille ile of the von riieiionshown l hone from the spiri oi his inreniim es lifeline-' hy' ifnefollowing claims ll claim- Si? l. The. combination in an :.iri'ieiallimi; ol' foot section. a shin eeetimixr a Connection for said seelionscomprising a shl Qanl terminating in a pair o1" journals or he footsection, a Yloou shank harina a head :En

located between said journals. and rollers inernosed lieween said headand journals.

2. The combination in an artificial limb of a fooi, section. a shinsecio-, ajoint nerposerl lieiween said sections comprising a s'nin shankhafirg a pair of arms one end each of said arms terininaing in. anincegfrzil Cylinder. said Cylinders haring onier portions adapted toserve as journals for said foot section and each containing; a hear-:ing cone. and a foot shank havingy a hollen' head surrounding he innerends oi2 s Cones and rollers interposed between s cones and the hollowhead of said shank.

Signed at Chicago this 10th day of Gerd her 1913.

i.. a, u

i 9 ai M, EBENE Horermzos.

